"Teamwork Lessons from the Geese" by Robert McNeish

This fall, when you see Geese heading south for the winter, flying along in ‘V’ formation, you might consider what science has discovered as to why they fly that way. As each bird flaps its wings, it creates uplift for the bird immediately following.
 
By flying in ‘V’ formation the whole flock adds at least 71 percent greater flying range than if each bird flew on its own. When a goose falls out of formation, it suddenly feels the drag and resistance of trying to go it alone and quickly gets back into formation to take advantage of the lifting power of the bird in front.